1 os4 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 
with cream color; all the tail feathers tipped with brownish white. Another 
adult male taken on December 15, at Triunfo, is similar, but less brownish or 
olivaceous on the head, neck, and under parts. 
Young female (No. 16, 496, Triunfo, December 7). Differing from the spring 
female in having the entire upper parts more olivaceous; the lower parts yel- 
lower ; the greater and middle coverts, as well as the inner secondaries, more 
broadly tinged with white ; the base of the upper mandible flesh colored to a 
little beyond (7. e., anterior to) the nostril. 
This Oriole occurs throughout Lower California, where it is a much com- 
moner bird than the preceding species. Mr. Bryant has found it on Santa Mar- 
garita Island in January, and Mr. Frazar took a few specimens at La Paz in 
February, and others at Triunfo in December. The latter observer believes, 
however, that by far the greater number leave the Peninsula before winter, 
“yeturning about the middle of March.” He saw only one individual on the 
Sierra de la Laguna, but observed many in the cafions at its base. The species 
was most numerously represented about Triunfo where it frequented trees near 
water, and began nest building late in June. The first eggs, a set of four, were 
found at San José del Rancho on July 14; during the following ten days, six 
nests and sets of eggs were obtained. Mr. Frazar notes three as the usual 
“clutch,” but four of the nests which he took contain four eggs each. 
The nests are essentially uniform in size and shape, and in these respects 
similar to the nest of the Baltimore Oriole, although smaller and decidedly 
shallower. Allare largely composed of a fine, straw-colored, jute-like fiber firmly 
interwoven, and four contain only this material, but the fifth is lined with 
horsehair, and the sixth with cotton and a few feathers. One was attached to 
the under side of a palm-leaf, two to the branches of orange trees, three were 
in bushes, and one was suspended at the end of a drooping branch of some 
deciduous tree. They were placed at heights above the ground varying from 
four to eight feet. Mr. Xantus found a nest ‘‘on an aloe four feet high,” 
another on thestem of a Yucca angustifolia six feet from the ground, a third in 
moss, “ hanging out of a perpendicular bluff, on the: sea-coast,” and a fourth 
“in a convolvulus, on a perpendicular rock fifty feet high.” } 
The twenty-five eggs taken by Mr. Frazar vary considerably in size and shape. 
Some are ovate, others elongate ovate, and still others elliptical ovate. The 
ground color is creamy white ; the markings are spots, blots, dashes, or irregu- 
lar pen-like lines of lavender, light reddish or dark purplish brown, arranged 
chiefly about the larger ends. These eggs average .89 X .61 with extremes of 
-96 x 60, .94 X .64, .83 .64 and .85 X .58. 
The Arizona Hooded Oriole is common in southern California and is found 
as far north as Santa Barbara. It also inhabits southern Arizona and western 
Mexico as far south as Mazatlan. 
1 Baird, Brewer, and Ridgway, Hist. N. Amer. Birds, II. 1874, 194. 
